#include<stdio.h>

int Sum(int s,int e)
{
    int result = 0;
    for(int i = s;i <= e;i++)
    {
        result += i;
    }
    return result;
}

int main()
{
    int start = 1;
    int end = 100;
    int n = Sum(start , end);
    printf("result is:[%d-%d]=%d\n",start ,end,n);

    return 0;
}
